import express from 'express'
import { organizations } from '../db/seedAuth.js'
import { nextId } from '../utils/id.js'
import { sendOk, sendFail } from '../utils/response.js'
import { requireAuth } from '../middleware/requireAuth.js'

const router = express.Router()
router.use(requireAuth)

function toDetailVo(org) {
  return {
    id: org.id,
    organizationId: org.organizationId,
    organizationName: org.organizationName,
    parentId: org.parentId,
    isBuiltIn: org.isBuiltIn,
    remark: org.remark
  }
}

function buildTree(list) {
  const nodeMap = new Map(list.map((o) => [o.id, { ...toDetailVo(o), children: [] }]))
  const roots = []
  nodeMap.forEach((node) => {
    if (node.parentId && nodeMap.has(node.parentId)) {
      nodeMap.get(node.parentId).children.push(node)
    } else {
      roots.push(node)
    }
  })
  return roots
}

// 查询机构树(支持按名称模糊/按organizationId精确过滤后仍返回完整树形结构)
router.get('/query-tree', (req, res) => {
  const { organizationName, organizationId } = req.query || {}
  let list = organizations
  if (organizationName) list = list.filter((o) => o.organizationName.includes(organizationName))
  if (organizationId) list = list.filter((o) => o.organizationId === organizationId)
  sendOk(res, buildTree(list))
})

// 平铺列表(供下拉选择器使用)
router.get('/list-all', (req, res) => {
  const { organizationName } = req.query || {}
  let list = organizations
  if (organizationName) list = list.filter((o) => o.organizationName.includes(organizationName))
  sendOk(res, list.map(toDetailVo))
})

router.post('/create', (req, res) => {
  const { organizationName, parentId, remark } = req.body || {}
  if (!organizationName) return sendFail(res, '机构名称不能为空', 400)
  const id = nextId('organization')
  const org = {
    id,
    organizationId: `ORG${String(id).padStart(4, '0')}`,
    organizationName,
    parentId: parentId || null,
    isBuiltIn: false,
    remark: remark || ''
  }
  organizations.push(org)
  sendOk(res, toDetailVo(org), '创建成功')
})

router.post('/update', (req, res) => {
  const { organizationId, organizationName, parentId, remark } = req.body || {}
  if (!organizationId) return sendFail(res, '机构ID不能为空', 400)
  const org = organizations.find((o) => o.organizationId === organizationId)
  if (!org) return sendFail(res, '机构不存在', 404)
  if (organizationName !== undefined) org.organizationName = organizationName
  if (parentId !== undefined) org.parentId = parentId
  if (remark !== undefined) org.remark = remark
  sendOk(res, toDetailVo(org), '更新成功')
})

router.post('/delete', (req, res) => {
  const { organizationId } = req.body || {}
  const org = organizations.find((o) => o.organizationId === organizationId)
  if (!org) return sendFail(res, '机构不存在', 404)
  if (org.isBuiltIn) return sendFail(res, '内置机构不可删除', 400)
  const hasChildren = organizations.some((o) => o.parentId === org.id)
  if (hasChildren) return sendFail(res, '该机构下存在子机构,不可删除', 400)
  const index = organizations.findIndex((o) => o.organizationId === organizationId)
  organizations.splice(index, 1)
  sendOk(res, true, '删除成功')
})

export default router